Broadhead hunting point



M116 l8, 1935, F, K N LE ET A 2,005,424

BROADHEAD HUNTING POINT Filed Sept. 20, 1930 swam how fei/vk M/VJLE arwlWWW Patented June 18, 1935 srrss BROADHEAD HUNTING POINT Frank Kindleand Roy Emmit Speck, Pendleton, Ind.

6 Claims.

Our invention relates to arrow heads for arrows such as are used inwild-game hunting.

The effectiveness of arrows especially when used. for this purpose,depends largely on the shape, ease of penetration, and ability of thearrow-head to cut a fairly large hole in the animal.

It is the object of our invention to improve the qualities ofpenetration and cutting by making the arrow head broad and thin, withits cut ting edges concave, and with the thinness extending well behindthe trailing points of the head so that the head may make an initialfullwidth out before the shank by which it is secured to the arrowenters that cut.

The accompanying drawing illustrates our invention: Fig. 1 is a sideelevation, and Fig. 2 is a plan of an arrow head embodying ourinvention.

Our arrow head has, in general, the conventional triangular arrow-headplan, with a point it and two trailing points H; and is desirably madeof a metal that will take and retain a sharp edge. Its cutting edges l2,extending between the point It! and the two trailing points H, areconcave, and meet at a very acute angle to make the point it a keen one.For fastening the arrow head to the shaft, we provide at the rear of thehead a shank it, which joins the triangular portion of the head at thebase thereof and desirably somewhat ahead of the trailing points M, theedges i l which join the cutting edges E2 to form such trailing pointsbeing angularly disposed with respect to the center line of thearrow-head for this purpose.

That portion of the shank which joins the shaft is convenientlycylindrical, and is provided on its end with a deep drilled hole id forthe reception of the end of the shaft. The portion of the shanksurrounding such drilled hole may also be provided with diametricallyopposite small holes it for the reception of a pin to hold the shank onthe shaft end.

Just ahead of the inner end of the drilled hole Hi the shank is cut awayon a gradual taper until its thickness is only about half the diameterof the cylindrical portion. Conveniently, this reduced thickness isreached at or just be hind a point in line with the two trailing pointsH; and from there along the center line of the head to the point it thethickness of the head decreases.

The maximum thickness of the head in any cross section taken at rightangles to the center line of the head is at that center line, and thethickness decreases symmetrically toward the re spective cutting edgesit. The greatest thickness of the triangular portion of the head is nearthe joint with the shank, and is desirably about one-eighth the over-allwidth of the head, or less; although this may be varied somewhat toinsure sufficient strength for the head.

An arrow head made in accordance with our invention will thus have anextremely keen point, will be thin and broad; and this thinness willco-operate with the concave cutting edges to provide a head of easypenetration, especially for the initial puncturing of the hide of ananimal. Further, the relatively thicker shank and shaft will not enterthe cut until after an initial full width out has been made, and thedrag exerted by such relatively thick shank and shaft will be minimized.

An arrow equipped with a head embodying our invention will thereforepenetrate deeply with less force, and will permit the use of a lighterbow with its evident advantages.

We claim as our invention:

1. An arrow head, comprising a triangular body portion and a shankintegrally joined to the base thereof and adapted to be secured to theend of an arrow shaft, the sides of said body portion being sharpened toprovide cutting edges, said body portion being symmetrically taperedlaterally from its median line, and its greatest thick ness ahead of thetrailing ends of such sharpened edges being less than one-eighth A;) thewidth between the two trailing points of said head and materially lessthan the thickness of said shank, said shank being gradually tapered atits forward end to provide an uninterrupted surface at said joint.

2. An arrow head, comprising a triangular body portion and a shankintegrally joined to the base thereof and adapted to be secured to theend of an arrowshait, the sides of said body portion being concave andsharpened to provide cutting edges, said body-portion beingsymmetrically tapered laterally from its median line, and its greatestthickness ahead of the trailing ends of such sharpened edges being lessthan one-eighth the width between the two trailing points of said headand materially less than the thickness of said shank, said shank beinggradually tapered at its forward end to provide an uninterrupted surfaceat said joint.

3. In an arrow head, the combination of a shank adapted to be secured tothe end of an rrcw shaft, and a cutter which is relatively thin withrespect to said shank disposed wholly ahead of said thicker shank andintegrally joined thereto, said cutter comprising a triangular bladesymmetrically tapered laterally of its median line and sharpened at itsedges, the greatest thickness of said blade being less than one-eighththe width between the trailing ends of said sharpened edges andapproximately one half the thickness of said shank, the forward end ofsaid shank being tapered to the thickness of the base of said blade.

4. In an arrow head, the combination of a shank adapted to be secured tothe end of an arrow shaft, and a cutter which is relatively thin withrespect to said shank disposed wholly ahead of said thicker shank andintegrally joined thereto, said cutter comprising a triangular bladesymmetrically tapered laterally of its median line and sharpened at itsedges, the greatest thickness of said blade being not more thanapproximately one-half the thickness of said shank, the Width betweenthe trailing edges of said blade being approximately four times thediameter of said shank, the forward end of said shank being tapered tothe thickness of the base of said blade.

5. In an arrow head, the combination of a shank adapted to be secured tothe end of an arrow shaft, and a cutter which is relatively thin withrespect to said shank disposed wholly ahead of said thicker shank andintegrally joined thereto, said cutter comprising a triangular bladesharpened at its edges, the greatest thickness of said blade being lessthan one-eighth the width between the trailing ends of said sharpenededges, the forward end of said shank being tapered to the thickness ofthe base of said blade.

6. An arrow head, comprising a thin triangular cutting blade adapted tocut a full width slit in the substance into which said arrow head isprojected without substantially opening such slit, a supporting shankfor said blade adapted to be mounted on the end of an arrow shaft, saidshank being positioned rearwardly of the cutting blade and tapered atits forward end whereby its opening of such slit will occur after thefull width 20 cutting thereof.

FRANK KINDLE. ROY E. SPECK.

